Bolster case for textile spinning and drawing machines

ABSTRACT

A bolster case wherein a tubular member is provided with a collar intermediate its ends and the collar is firmly engaged between an enlarged tubular portion formed at one side thereof and a bead formed at the other side.

United States Patent [191 Tingley, .Ir.

1 Mar. 27, 1973 BOLSTER CASE FOR TEXTILE SPINNING AND DRAWING MACHINES {761 Inventor: Loyal I-I. Tingley, Jr., Box 406,

Havana, 111. 62644 [22] Filed: Dec. 23, 1969 [21] AppLNoJ 1,905

Related US. Application Data [62] Division of Ser. No. 681,351, Nov. 8, 1967, Pat. No.

[52] US. Cl ..57/130 [51 Int. Cl. ..D0lh 7/12 [58] Field of Search ..57/130, 131, 132, 133, 134, 57/135; 29/512, 523; 285/382.5; 308/149, 150, 155, 156, 228

[56] References Cited UNITED STATES PATENTS 2,806,342 9/1957 Rock ..57/135 1,504,812 8/1924 Carlson ..57/133 X 2,179,248 11/1939 Bandish et al. ..285/382.5 X

FOREIGN PATENTS OR APPLICATIONS 269,439 4/1927 Great Britain ..57/130 Primary Examiner-Wemer H. Schroeder Attomey-Bacon & Thomas 57 ABSTRACT A bolster case wherein a tubular member is provided with a collar intermediate its ends and the collar is firmly engaged between an enlarged tubular portion formed at one side thereof and a bead formed at the other side.

3 Claims, 6 Drawing Figures drawing equipment, where the extremely high speeds of operation and other demanding conditions of usage require a precision-formed element having a strong, sturdy, and rugged construction.

A primary object of the present invention is to provide a process for firmly fixing a collar or the like onto a tubular element whereby the final product is precisely dimensioned, rigidly interconnected and sturdy in construction, in the nature of an integral bolster case.

Another object is to provide a process for fixing a collar in'position on a tubular element wherein the process is simple, quick and economical in operation, not requiring the skill and expense of welding, soldering or the like. I

A .further object is to provide a product of the appropriate general configuration, construction, and

dimensions for specific application as the bolster case for conventional textile spinning equipment;

More specifically, it is an object of the present invention to provide a rigidly interconnected collar adapted to serve as the bolster flange on a bolster casing.

.Other objects and advantages will be apparent from a study of the following specification, when considered in conjunction with the accompanying drawings, in which:

FIG. 1 is a side elevational view, largely in section, illustrating the first step of a process in accordance with the present invention;

FIG. 2 is a sectional view illustrating a second step of the process, as applied .to the product shown in FIG. 1;

FIG. 3 is a sectional'view illustrating a third step of I the process,

as applied in turn to the product shown in FIG. 1; i

FIG. 4 is a sectional view showing a fourth step of the process, as applied in turn to the product shown in FIG.

FIG. 5 is an elevational view illustrating the manner in which the product is removed from the apparatus after completion'of the fourth step; and v FIG.'6 is an elevational view of the final product formed in accordance with the principlesof this invention. Y

Referring now in more detail to the drawings, the product of this invention is preferably formed from conventional tubing of steel or the like, having the appropriate properties as to strength, hardness and so on. In the embodiment shown this tubing may be on the order of five and three-quarters inches in length with an outside diameter of seven-eighths inch and an internal diameter of eleven-sixteenth inch. As shown in FIG. 1, the tubular member, generally indicated by the numeral l, is positioned in the bore 3 of a conventional female die 5 having a corresponding. internal diameter in the lower portion thereof. The upper portion 7 of the bore 3 is somewhat enlarged, providing an upwardly directed shoulder 8 that is preferably somewhat tapered in configuration. As shown in FIG. I, the upper portion 9 of the tubular member 1 is enlarged by a male die member 11 introduced into the projecting upper end thereof. The male die member 11 may have a projecting pilot plug 13 at its lower end and is provided 'with a ball-.type forming element 15 to enlarge the tube 1 by expanding its walls into conformity with the enlargedp'ortion 7 of the die. This step may be accomplished by a single quick punching action.

When the die member 11 has been retracted, the tubing 1 and its associated female die 5 may be moved to another station for performance of the second step, as illustrated in FIG. 2. Here a conventional reducing die 17 is applied against the uppermost part 18 only of the expanded upper tubing portion 9, i.e., that portion which projects above the upper extremity of the female die 5. As a result, the uppermost portion 18 of the tubing,- which had been expanded to an external diameter on the order of 15/16 inch, is reduced again to approximately its original diameter. This in turn leaves an enlarged portion 19 intermediate the ends of the tubing 1, defined at its lower end by a first external annular shoulder 21 and at its upper end by a second external annular shoulder 23. Preferably the open end of reducing die 17 is provided with an internal taper as shown at 25 to effect a corresponding taper in the shoulder 23.

After the reducing die 17 has been retracted, the tubing 1 is provided with a collar member 27 adapted to fit tightly about the reduced portion 18 and bear against shoulder 23. As best shown in FIGS. 3 and 4, the collar 27 is provided with a taper 31 corresponding to the taper in shoulder 23 to thereby permit snug engagement therewith. It is also provided with an internal annular recess33 for a purpose which will appear hereinafter.

As shown in FIG. 3 the tubing 1 carried in die 5 is brought into position beneath a beading punch 35, and the collar 27 is engaged by a retaining ring 37 mounted concentrically on the punch 35. Springs 39 serve to urge the retaining ring 37 into engagement with collar 27 to hold it firmly in position against the shoulder 23.

At this pointthe beading punch 35 is actuated to move downwardly into closely surrounding relation with respect to the reduced upper portion 18 to thereby positively confine the same. Preferably .the bore 40 of the beading punch is somewhat smaller in diameter than the portion 18 and serves to further reduce the cross-section of the latter. As the punch 35 is further lowered, the outer extremity of reduced portion 18 is engaged by the base 41 of the punch, and, with the wall of portion 18 confined along substantially its entire length, an external bead 43 is formed immediately below the punch 35. As will be seen in FIG. 4, the bead 43 is at least in large part received in groove 33 of collar 27. Again, a single punching operation is sufficient to, first, clamp the collar 27 in engagement and, secondly, form the bead 43. Thus the collar 27 is rigidly and securely clamped in position on the tubular member 1 between the enlarged portion 19 and the bead 43.

Subsequently the tubing 1 may be removed from the die 5, as by actuation of an ejector 45 in the manner shown in FIG. 5. For the purpose of adapting it for mounting on a bolster rail, the enlarged portion 19 is next provided with screw threads 47 by any conventional means (not shown). Further fabrication may proceed in the conventional manner to adapt the fabricated bolster case for application in a bolster assembly.

It will be understood that the single embodiment dis+ closed herein has been presented by way of illustration rather than limitation. Numerous modifications may be made without departing from the spirit of the invention or the scope of the annexed claims.

Iclaim:

1. A bolster case, comprising: a tubular element having intermediate its ends one portion" of enlarged diameter, said portion being defined at either end 1 is tapered and said collar member is provided with a corresponding taper for engagement therewith.

3. The construction of claim 1 wherein said collar member is provided with an 'intemal annular .g'roove receiving said bead at said other side of said collar member. 

1. A bolster case, comprising: a tubular element having intermediate its ends one portion of enlarged diameter, said portion being Defined at either end thereof by external annular shoulders; a collar member mounted on said tubular element with one side of said collar member bearing against one of said shoulders; and a bead formed in said tubular element at the other side of said collar bearing against the other side of the collar member to hold said collar member firmly against said one shoulder.
 2. The construction of claim 1 wherein said shoulder is tapered and said collar member is provided with a corresponding taper for engagement therewith.
 3. The construction of claim 1 wherein said collar member is provided with an internal annular groove receiving said bead at said other side of said collar member. 